docs: def create(cls, name, email, cb):
          """
          Create the basic structure of a player
          """
          it = cls(name, create_structure=True)
          it.value['email'] = email
  
          # In an actual application you'd probably want to use 'add',
          # but since this app might be run multiple times, you don't
          # want to get KeyExistsError
          cb.upsert_multi(ItemSequence([it]))
          return it